3931628 has 12 divisors (see below), whose sum is σ = 6895392. Its totient is φ = 1961520.

The previous prime is 3931589. The next prime is 3931639. The reversal of 3931628 is 8261393.

It is a junction number, because it is equal to n+sod(n) for n = 3931594 and 3931603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1901 + ... + 3387.

It is an arithmetic number, because the mean of its divisors is an integer number (574616).

Almost surely, 2^3931628 is an apocalyptic number.

It is an amenable number.

3931628 is a deficient number, since it is larger than the sum of its proper divisors (2963764).

3931628 is a wasteful number, since it uses less digits than its factorization.

3931628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152 (or 2150 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 3931628 is about 1982.8333263288. The cubic root of 3931628 is about 157.8304542459.

The spelling of 3931628 in words is "three million, nine hundred thirty-one thousand, six hundred twenty-eight".